How to Make Fried Onion French Fries

Ingredients

• 4 large russet potatoes (about 2 pounds or 900g)
• 1 teaspoon salt (5g)
• 1 teaspoon pepper (5g)
• 1 tablespoon cornstarch (8g)
• 1 large onion, thinly sliced (about 8 ounces or 225g)
• 1 cup buttermilk (240ml)
• 1 cup all-purpose flour (120g)
• 1 teaspoon garlic powder (3g)
• 1 teaspoon paprika (2g)
• ½ teaspoon cayenne pepper (optional for heat) (1g)
• Vegetable oil (for frying - about 4 cups or 1 liter)